Prediction of superconducting ternary hydride MgGeH6: from divergent high-pressure formation routes

2017 ◽  
Vol 19 (40) ◽  
pp. 27406-27412 ◽  
Author(s):  
Yanbin Ma ◽  
Defang Duan ◽  
Ziji Shao ◽  
Da Li ◽  
Liyuan Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Ab Initio ◽  
Phase Diagrams ◽  
High Temperature Superconductivity ◽  
High Pressure Phase ◽  
Pressure Phase

Invigorated by the high temperature superconductivity in some binary hydrogen-dominated compounds, we systematically explored high-pressure phase diagrams and superconductivity of a ternary Mg–Ge–H system usingab initiomethods.

scholarly journals High-pressure phase diagrams of FeSe1−xTex: correlation between suppressed nematicity and enhanced superconductivity

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
K. Mukasa ◽  
K. Matsuura ◽  
M. Qiu ◽  
M. Saito ◽  
Y. Sugimura ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Phase Diagrams ◽  
High Temperature Superconductivity ◽  
High Pressure Phase ◽  
Recent Theory ◽  
Magnetic Fluctuations ◽  
End Point ◽  
Enhanced Superconductivity ◽  
Pressure Phase

AbstractThe interplay among magnetism, electronic nematicity, and superconductivity is the key issue in strongly correlated materials including iron-based, cuprate, and heavy-fermion superconductors. Magnetic fluctuations have been widely discussed as a pairing mechanism of unconventional superconductivity, but recent theory predicts that quantum fluctuations of nematic order may also promote high-temperature superconductivity. This has been studied in FeSe1−xSx superconductors exhibiting nonmagnetic nematic and pressure-induced antiferromagnetic orders, but its abrupt suppression of superconductivity at the nematic end point leaves the nematic-fluctuation driven superconductivity unconfirmed. Here we report on systematic studies of high-pressure phase diagrams up to 8 GPa in high-quality single crystals of FeSe1−xTex. When Te composition x(Te) becomes larger than 0.1, the high-pressure magnetic order disappears, whereas the pressure-induced superconducting dome near the nematic end point is continuously found up to x(Te) ≈ 0.5. In contrast to FeSe1−xSx, enhanced superconductivity in FeSe1−xTex does not correlate with magnetism but with the suppression of nematicity, highlighting the paramount role of nonmagnetic nematic fluctuations for high-temperature superconductivity in this system.

High-Pressure Phase Diagrams of Methane + Squalane and Methane + Hexatriacontane Mixtures

1998 ◽  
Vol 43 (3) ◽  
pp. 362-366 ◽  
Author(s):  
P. Marteau ◽  
P. Tobaly ◽  
V. Ruffier-Meray ◽  
J. C. de Hemptinne
Keyword(s):  
High Pressure ◽  
Phase Diagrams ◽  
High Pressure Phase ◽  
Pressure Phase

scholarly journals High-pressure phase diagrams of CeRhIn5and CeCoIn5studied by ac calorimetry

2004 ◽  
Vol 16 (49) ◽  
pp. 8905-8922 ◽  
Author(s):  
G Knebel ◽  
M-A Méasson ◽  
B Salce ◽  
D Aoki ◽  
D Braithwaite ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Diagrams ◽  
High Pressure Phase ◽  
Ac Calorimetry ◽  
Pressure Phase

scholarly journals Quenching ilmenite with a high-temperature and high-pressure phase using super-high-energy ball milling

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Takeshi Hashishin ◽  
Zhenquan Tan ◽  
Kazuhiro Yamamoto ◽  
Nan Qiu ◽  
Jungeum Kim ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
High Pressure Phase ◽  
Energy Ball ◽  
Pressure Phase
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